Brass Wind Instrument 0.8-1Mm Knock Ball Head Aluminum Dent Hammer For Valve And Description: (Note: The end of the tool rod is sharp, so be careful not to scratch your hands when assembling) Fits for bump and deformation pipe body of brass instruments which is an excellent tool for repairing indentation. Made from Stainless steel, high strength, wear resistance, good durability, and also has long service life. Easy to use, easy to operate. Anti-slip sponge handles for great comfort and firm control. Choose the appropriate sheet metal ball size according to the degree of depression of the instrument tube to repair the dent. Suitable for trumpet, trombone, euphonium, baritone, tuba, horn, etc. most brass instruments.